Anthrachinone disulfonic acid.



. chemist, a resident of Crefeld, Sudstrasse7,

the presence of mercury (as such orinthe trated INITED STATES PATENT OFFICE.

MICHAEL JLJINSKY, oF CREFELD, GERMANY.

ANTHRACHINYON e DISUILFONIO ACID.

To all/[whom] it mayooncern:

.Be it known that I, MIoHAEL. JLJINSKY,

in the German Empire, a subject of the Russian Em eror, have invented a new Anthra chinone isulfonic Acid, of which the following is a specification.

' In my application, Ser. No: 165426, filed Jul 14, 1903, I have described a process of sul onating anthrachinone or other organic bodies, especially anthracene derivatives, in

form of mercury compounds) by which proc. ess'the'sulfo group or grou s enter in other positions than by the sul onating process only by means of sulfuric acid. I have found that by this process the new 1-7-an-, thrachinone disulfonic 'acid is obtained by treating anthrachinone or 'anthrachinone nioho-meta-sulfonic acid with sulfuric acid in the esence of mercury, as may be illusy the following exam les.

= Example I' 100 parts of ant achinone 1.5 parts of mercur Y sulfate. 200 parts of fum mg sulfuric aci of 40% free SO are slowly heated to about 160. C and kept at this temperature for an hour. The sulfonated mixture, on cooling, represents a homogenous tenacious mass and is very easily soluble in. water. The sulfonic acids formed are transferred into saltsof lime, whereupon the solu- Specification of Letters Batent. Application filed November 13,

' seen from the annexed table.

Patented April 23.1907.

soaserial Nozsasss.

tion of the lime salts is freed of gypsum and concentrated. As principal product there results the lime salt of the new 1-7-'anthra chinone disulfonic acid, which lime salt is characterized by being dissolved very easily in hot water. a

In place of the anthrachinone the anthrachinone meta-mono-sulfonic acid may be employed, whereby of course a smaller quantity of fuming sulfuric acid is necessary. Consequently for the present invention anthrachlnone meta-mon0-sulfonic acid is to be considered to be equivalent to anthrachinone. Y

Exam le II. v parts of .anthrachinonemeta-sul onic acid sodium. parts of mercury sulfate arts of fuming sulfuric acid of 40% free S are slowly heated to about C- and ke t at this temperature for an hour. The col syrup-like mass is dissolved in Wa ter, neutralized with chalk and the solution, freed of gypsum, is concentrated.

There results as the principal product, as according to Example I the lime'salt of the new 1-7-anth1'achinone disulfonic acid, such lime-salt being very soluble in hot water.

The new acid forms a sodium salt, which is different from the sodiurnsalts of the known .anthrachinone 2.6-disulfonic acid and anthrachinon 2.7 disulfonic acid, as may be Sodium salt of the lmown ani thrachinone 2.6 disulfonic acid, obtained by sulfonating I r, anthrachinone 2 mono-sulfonlc acid sodium without i the employment of mercury.

Crystalline powder Appearance Solubility Behaviour of a 5 per cent solution with chloride o1 barium.

Sulfate of copper No precipitation Acetate of lead No precipitation: by adding I diluted nitric acid strong crystalline separation, insoluble in heat.

Addition of a like volume or Crystalline separation soluble i'onc. in boiling.

lnanclting with lime yields. Q. Anthrallavin acid.

- the employment of mercury.

Sodium 'salt oi the known anthrachinone 2.7-disulfonic acid obtained by sulionating anthrachinone a mono-sultonic acid sodium without Sodium salt of the new 1.7 acid,

obtained by treating anthrachinone 2-mono-sulfonic acid with sulfuric acid in the presence of mercury Crystalline powder 1 gr. dissolves in 3 com. water, the solution gives in cool ing a bulk of fine needles.

Immediate gelatinous precipitation, insoluble inhcat and also in diluted HCl.

No precipitation.

Do. No preci itation also in adding dilute nitric acid. e

After standing a long time crystalline sepa ration. Metabenz-dioxyanthrachinone.

N0 precipitation Corrections in Letters Patent No. 851,423.

5 In testlmony herepf I have slgne name to this speclfica tlon, mfohe presence of two subscribing wlt nesses.

MICHAEL JLJINSKY.

- btain the r be new acld 15 to be nsed to 0 eor z esponding useful oxy-anthraehn1one and im ortano dye-stgufis. ti n s m lnve'n 0 v v T e l fevt sn useful &I1th1a(3 hlfl0iedl1- fonic acid chalacterlzed by havmg t e 511 0 witnesses: V i W. BRUCE WALLACE,

groups in the [)OSitiOll 1L7, BII ld glVlIlg 8 S0- MARGARET W ALLACE.

v 1 1t 01' stalhzm 1n fine needles on cqo 125121 hozsolution end yleldmg 1n meltmg 1 0 with lime metsbenz-dlexyanthraehlnone.

It is hereby ceftifi'ed the; Letters Patent NU. 851,423, granted April 23, 1907, uipon the application of Michael .Iljinsky, of 'Crefeld, Germany, for an improvement in I "'Anthrachinone Disulfonic Acid, were erroneously issued to said Jljinsky as owner ofsa-id invention; whereas said LettersPatent should have been issued to R. Wedek i'rid &: 00., of Uerdingen on the Rhine, Gehmqny, as assignee of the entire interest in said pai'lent, as shown by the'reeord of assignments in this office; And that .Lhe said Letterslatentshonld he read with this correction therein that the g mme may em f'orm tdthe record of the case in the PatenfiOfiiee. I

Signed and sealed this 30th day of July, A. DJ, 1907. I

[SEALJ 0. 0. BI LLINGS,

I I Acting Commissioner of Peienfa.

Corrections in Letters Patent No. 851,423.

5 In testlmony herepf I have slgne name to this speclfica tlon, mfohe presence of two subscribing wlt nesses.

MICHAEL JLJINSKY.

- btain the r be new acld 15 to be nsed to 0 eor z esponding useful oxy-anthraehn1one and im ortano dye-stgufis. ti n s m lnve'n 0 v v T e l fevt sn useful &I1th1a(3 hlfl0iedl1- fonic acid chalacterlzed by havmg t e 511 0 witnesses: V i W. BRUCE WALLACE,

groups in the [)OSitiOll 1L7, BII ld glVlIlg 8 S0- MARGARET W ALLACE.

v 1 1t 01' stalhzm 1n fine needles on cqo 125121 hozsolution end yleldmg 1n meltmg 1 0 with lime metsbenz-dlexyanthraehlnone.

It is hereby ceftifi'ed the; Letters Patent NU. 851,423, granted April 23, 1907, uipon the application of Michael .Iljinsky, of 'Crefeld, Germany, for an improvement in I "'Anthrachinone Disulfonic Acid, were erroneously issued to said Jljinsky as owner ofsa-id invention; whereas said LettersPatent should have been issued to R. Wedek i'rid &: 00., of Uerdingen on the Rhine, Gehmqny, as assignee of the entire interest in said pai'lent, as shown by the'reeord of assignments in this office; And that .Lhe said Letterslatentshonld he read with this correction therein that the g mme may em f'orm tdthe record of the case in the PatenfiOfiiee. I

Signed and sealed this 30th day of July, A. DJ, 1907. I

[SEALJ 0. 0. BI LLINGS,

I I Acting Commissioner of Peienfa.

It is hereby certified that Letters Pattent No. 851,423, granted April 23, 1907, upon the application of Michael Jljinsky, of Crefeld, Germany, for an improvement in "Anthrachiuone Disulfonic Acid, were erroneously issued to said Jljinsky as owner of said invention; whereas said Letters Patent should have been issued to R. Wedekind d2- C'o., of Uerdingen on the Rhine, Gerinany, as assignee of the entire interest in said patent, as shown by the reeord of assignments in this uflice; and that the said Letters Patent should he read with this correction therein that the same may uniform to the record of the case in the Patent Ofiice.

Signed and sealed this 30th day of July, A. D., 1907.

[SEAL] o. o. BILLINGS,

- Acting Commissioner of Patents. 

